In the dodgier parts of the world this stuff will be obtainable, if it can be trusted or not remains to be seen.
The sole reason Sn suppliers in the Uk have tightened up is because so many links to companies were posted in the open here, thus easily searchable by the companies themselves. At one point if you put a particular company name & sn into a search engine we here were the first flipping result, well above the company, to think they were not going to notice was daft, Then all they had to do was fall back on the already ample regulations surrounding chemical companies due diligence around hazardous chemicals, the rest is history as they say.
Maybe not the sole reason, but surely one reason, agreed: I suspect that more pressure is being placed on suppliers, possibly by the Home Office/Ministry of Health to be more critical in what they deem to be "suspicious" attempts to buy. At the risk of repeating myself, remember that the UK government appointed a junior Health Minister with special responsibility for suicide reduction fairly recently. It doesn't take much imagination to guess that this person and her staff will be asking about how to restrict access to means of suicide, and I would be surprised if this forum is not being monitored to some degree.
I'm not paranoid about this, by any means - I have some direct personal knowledge of intelligence gathering and evaluation and I ask myself, "In their shoes, what would I do ?"
The apparent surge in interest in SN by the suicidally inclined will attract attention too. (A quick shufti at the Topic Discussion listing showed that out of the first ten topics, five were concerned with SN.)
Overt mention in the forum of sources of supply probably doesn't help, but restricting answers to the question, "where do I get it?" to PM's won't be effective. Within the last few days there have been a couple of new joiners who have rapidly clocked up the necessary five posts with comments of the "Good Luck, Safe Journey" variety,, then asked "where do I get it?" without any of the normal discussion or curiosity about methods.
They may be genuine, who knows ?